11.
OPERATION
11.1
Operation
Modes
The operation mode
of
the inverter is classified into the following three modes
-
the external
operation mode in which the inverter operation is controlled by the external signals, the
PU
opera-
tion mode in which the inverter operation is controlled by the parameter unit, and the combined
operation mode in which the inverter operation is controlled by both
the
externals signals and the
parameter unit.
Factory-set operation
mode
When power is turned
ON
or
when the in-
verter is reset, the operation mode is set to
"operation using external input slgnals".
Therefore, the inverter can be operated using
the external signals when
it
is tumed
ON.
The
inverter starts operating if the start signal
(STF/STR and
SD)
is turned
ON
in this state.
A
speed reference signal is also required for
motor rotation.
To
fix the operation
mode
it is possible to set the operation mode which
is established when power is turned
ON.
For
example, if the inverter needs to
be
operated
only in the PU operation mode, it is possible
to set the PU operation mode as the mode to
be
estaMished when power is tumed
ON.
In
this state, there is no need to press the opera-
the
paramam
unll.
devm
(frequency
sen~ng
varlabl
operation mode aiter turning
ON
power.
*
Freqwncy
IS
$91
mth
an
0Iternal
tion mode selection key to
select
the PU
The procedure to set the default mode for the
mode which is established when power is
turned on
is
explained on page
27.
-
25
-
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